EP3799670A1 - Low-voltage power switch and arc fault detection unit with compensation due to phase shifting - Google Patents
Low-voltage power switch and arc fault detection unit with compensation due to phase shiftingInfo
- Publication number
- EP3799670A1 EP3799670A1 EP18785862.6A EP18785862A EP3799670A1 EP 3799670 A1 EP3799670 A1 EP 3799670A1 EP 18785862 A EP18785862 A EP 18785862A EP 3799670 A1 EP3799670 A1 EP 3799670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- current
- low
- rogowski coil
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 239000004020 conductor Substances 0.000 claims abstract description 69
- 230000010363 phase shift Effects 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 230000010354 integration Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 22
- 230000007935 neutral effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013211 curve analysis Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Definitions
- the invention relates to a low-voltage circuit breaker for a low-voltage AC circuit according to the Oberbe handle of claim 1, an arcing detection unit for a low-voltage AC circuit according to the preamble of claim 3 and a method for arc detection for a low-voltage AC circuit according to the preamble of claim 9.
- Circuit breakers are protective devices that function similarly to a fuse. Circuit breakers monitor the current flowing through them by means of a conductor and interrupt the electrical current or energy flow to an energy sink or a consumer, which is referred to as a trigger if protective parameters, such as current limit values or current time period limit values, i.e. if a current value is available for a certain period of time, are exceeded.
- protective parameters such as current limit values or current time period limit values, i.e. if a current value is available for a certain period of time, are exceeded.
- the set current limit values or current time period limit values are corresponding trigger reasons. The interruption occurs, for example, through contacts of the circuit breaker that are opened.
- circuit breakers In particular for low-voltage circuits, systems or networks, there are various types of circuit breakers depending on the amount of electrical current provided in the electrical circuit. With circuit breakers in the sense of the invention, in particular switches are meant as they are used in low voltage systems for currents, in particular nominal currents or maximum currents, of 63 to 6300 amperes. Closed circuit breakers are more specifically used for currents from 63 to 1600 amps, in particular from 125 to 630 or 1200 amps. Open circuit breakers are used in particular for currents from 630 to 6300 amps, more particularly from 1200 to 6300 amps. Open circuit breakers are also referred to as air circuit breakers (ACB), and closed circuit breakers as molded case circuit breakers or molded case circuit breakers (MCCB).
- ACB air circuit breakers
- MCCB molded case circuit breakers
- Low voltage means voltages up to 1000 volts AC or 1500 volts DC. Low voltage means more particularly voltages that are greater than the low voltage with values of 50 volts AC or 120 volts DC.
- circuit breakers in the sense of the invention are in particular circuit breakers with a serve as a control unit, the electronic trip unit, also referred to as an electronic trip unit, ETU for short.
- ETU electronic trip unit
- Switching arcs such as those that occur during electrical switching, in particular at the contacts, are not meant here.
- Arc faults refer to arcs as they occur in the event of electrical faults in the circuit or in the system. For example, these can be caused by short circuits or
- Parallel arcing faults can e.g. caused by aging of the insulation material or presence of conductive contamination between phase conductors. You can choose between two different phase conductors, between phase conductor (L) and earth conductor (PE), or between phase conductor and
- Neutral conductor (N) occur.
- the parallel arc also results from a serial arc, e.g. due to improper work or incorrectly dimensioned touching devices.
- an arc has the properties of a parallel and a serial arc, this is referred to as a combined arc.
- arcing faults create a conductive, faulty connection between conductors or system parts.
- One possibility is to identify an arcing fault from measured voltage and current values by evaluating characteristic properties. This is often done by using a microprocessor to evaluate the voltage and current values or to carry out corresponding calculations. For many algorithms, phase and voltage values must be available in order to reliably detect an arcing fault or to avoid errors in the detection so that it is not interrupted of the low-voltage circuit, although there was no arcing fault.
- the voltages are usually averaged with voltage sensors, which usually work in phase.
- measuring resistors so-called shunts, have been used to determine the currents.
- the voltage is measured via a known resistance and the current is averaged from it. This provides a phase-accurate determination of the level of the current.
- measuring resistors have the disadvantage that considerable power losses occur in proportion to the amount of current. These should not be neglected, especially in low-voltage AC networks with high current.
- Rogowski coils for determining the level of the current. These supply a voltage proportional to the differentiated current. The level of the current can be determined by integrating this voltage. Rogowski coils have the disadvantage that the determined amount of the current is not in phase. This is generated by the stray field inductance of the coil of the Rogowski coil. However, Rogowski coils have the advantage that they have potential isolation, high current resistance and small sizes.
- the object of the present invention is to enable the use of Rogowski coils for determining phase-accurate current values, in particular for arc fault detection, especially for a low-voltage circuit breaker and an arc fault detection unit.
- a low-voltage circuit breaker ter with the features of claim 1, an arc fault detection unit with the features of claim 3 or a method with the features of claim 9.
- an arrangement for a low-voltage alternating current circuit in particular a low-voltage circuit breaker or an arcing fault detection unit, is proposed, comprising:
- At least one Rogowski coil for determining the amount of electrical current of a conductor, in particular Rogowsku len for all conductors, the low-voltage AC circuit, which outputs an analog voltage (PI), which is an equivalent of the amount of electrical current of the conductor.
- PI analog voltage
- a microprocessor which performs an arcing fault detection with the determined amount of current and voltage of the low-voltage alternating current circuit and, when at least one limit value is exceeded, emits an arcing fault detection signal.
- the arrangement is designed according to the invention in that the Rogowski coil (or each Rogowski coil) is connected to (each) egg nem an analog integrator, which (each) is followed by an analog-digital converter, which (each) the integrated analog voltage in (each ) implements a digital signal that is (are) processed by the microprocessor in such a way that the by the Rogowski coil and the Ro
- Rogowski coils with the advantages mentioned can be used in particular for the detection of arcing faults, whereby simple algorithms for arcing fault detection can also be used by the compensation of the phase shift or the algorithms in this case deliver reliable results and are faulty Interruptions to the low-voltage circuit to be protected can be avoided.
- an amplifier is provided between the Rogowski coil and the analog-digital converter.
- a differential amplifier can be provided to increase the amplitude.
- a filter is connected downstream of the Rogowski coil or the integrator, or a filter is connected upstream of the analog-digital converter.
- the Rogowski coil is characterized by a mutual inductance, a stray field inductance and a winding resistance; the analog integrator has at least one resistance-capacitor arrangement, with a resulting capacitance and a resulting resistance.
- the digital signal by means of the mutual inductance
- Stray field inductance, the resulting capacitance and the sum of winding resistance and resulting resistance are calculated in phase current values.
- the in-phase digital current values for the amount of current in the conductor are calculated using the following formula:
- the voltage values and current values are fed to a microprocessor which is designed in such a way that an interference arc detection is carried out and an internal arc detection signal is emitted if at least one limit value is exceeded.
- the analog voltage is integrated and further processed in such a way that the phase shift generated by the Rogowski coil and the integrator, and possibly other components, is compensated for, so that phase values for the arcing fault detection are determined and used.
- Figure 1 is a block diagram of a low voltage power switch
- Figure 2 is a block diagram of an arc fault detection unit
- FIG. 3 shows an arrangement according to the invention
- FIG. 4 shows an equivalent circuit diagram of a Rogowski coil
- FIG. 5 shows a first diagram with a voltage and current curve
- FIG. 6 shows an equivalent circuit diagram of a Rogowski coil and an integrator
- FIG. 7 shows a second diagram with a voltage and current curve
- FIG. 8 shows an equivalent circuit diagram with combined components
- Figure 9 shows a third diagram with a first and a two-th current profile.
- Figure 1 shows a schematic block diagram of a low-voltage circuit breaker LS.
- Figure 1 shows electrical conductors LI, L2, L3, N of a low-voltage circuit, for example a three-phase AC circuit, the first conductor LI the first phase with the first phase current ip (t), the second conductor L2 the second phase with the second phase current , the third conductor L3 forms the third phase with the third phase current and the fourth conductor forms the neutral conductor N with the neutral conductor current of the three-phase AC circuit.
- the first conductor LI is connected to an energy converter EW (for example as part of a converter set) in such a way that at least part of the current, ie a partial conductor current, or the entire current of the first conductor LI through the primary side of the energy converter EW flows.
- a conductor in the example the first conductor LI, usually forms the primary side of the energy converter EW.
- the energy converter EW is usually a transformer with a core, for example an iron converter.
- an energy converter EW can be provided in each phase or in each conductor of the electrical circuit.
- the secondary side of the energy converter EW or each envisaged energy converter is connected to a power supply unit NT (or more power supply units) which provides a power supply, for example a self-supply, for example in the form of a supply voltage, for the units of the low-voltage circuit breaker, in particular an electronic trip unit ETU, available, represented by a dashed line Ver connection of operating voltage conductors BS.
- the power supply unit NT can also be connected to at least one or all of the current units SEI, SE2, SE3, SEN, for energy supply to the current units - if necessary.
- Each current unit SEI, SE2, SE3, SEN is connected to a Roowski coil RS1, RS2, RS3, RSN, for determining the amount of electrical current of the conductor of the electrical circuit assigned to it.
- the first current unit SEI is the first conductor LI, i.e. the first phase; the second power unit SE2 to the second conductor L2, i.e. the second phase; the third power unit SE3 the third conductor L3, i.e. the third phase; the fourth Stromein unit SEN assigned to the (fourth conductor) neutral conductor N.
- the Rogowski coils RS1, RS2, RS3, RSN deliver an analog voltage Al, A2, A3, AN proportional to the level of the conductor current at their output. This is fed to the first to fourth current units SEI, SE2, SE3, SEN.
- the first to fourth current units SEI, SE2, SE3, SEN are part of the electronic trip unit ETU. However, they can also be provided as a separate unit (s).
- the current units SEI, SE2, SE3, SEN are used to process the voltage of the respective Rogowski coils.
- the current units SEI, SE2, SE3, SEN deliver, for example, a digital signal PI, P2, P3, NS to a microprocessor MP which e.g. is provided in the electronic trip unit ETU.
- the transmitted digital signals PI, P2, P3, NS are compared in the electronic tripping unit ETU with current limit values and / or current-time limit values, which form the triggering reasons. If this is exceeded, an interruption of the electrical circuit is initiated.
- Overcurrent and / or short-circuit protection is hereby implemented. This can take place, for example, in that an interruption unit UE is provided which, on the one hand, is connected to the electronic trigger unit ETU is connected and on the other hand has contacts K to interrupt the conductors LI, L2, L3, N or other conductors. In this case, the interruption unit UE receives an interruption signal for opening the contacts K.
- FIG. 2 shows an arrangement for internal arc detection with an internal arc detection unit SLE, identical units according to FIG. 1 being provided.
- This has at least one Rogowski coil RS1 for determining the level of the electrical current of a conductor LI of the low-voltage alternating circuit, which outputs an analog voltage Al, which is an equivalent of the level of the electrical current of the conductor LI.
- the Rogowski coil RS1 is connected to a power unit SEI.
- it has at least one voltage sensor SS for determining the level of the voltage of the conductor LI or the conductor of the low-voltage alternating current circuit.
- microprocessor MP which is connected to the current unit SEI and the voltage sensor SS, the determined level of the current and the voltage of the low-voltage alternating current circuit being used for arc fault detection by the microprocessor. If at least one or more limit values / internal arc limit values are exceeded, an internal arc detection signal SLES is emitted.
- the internal arc detection can take place according to known methods, for example a signal curve analysis of the voltage and / or the current, a differentiating or integrating solution, etc.
- FIG. 3 shows an embodiment of a current unit SEI according to FIG. 2 or FIG. 1.
- This has an analog integrator INT, which is connected to the Rogowski coil RS1.
- the analog voltage Al of the Rogowski coil is fed to this.
- analog integrator is meant an integrator that uses dis- Crete components, such as capacitors, inductors, resistors, etc. performs an integration, according to the analog circuitry. Ie an analog signal is integrated.
- the analog integrator INT supplies an integrated analog voltage uc (t).
- this is implemented directly in analog-digital form, e.g. by an analog-to-digital converter ADU, which emits a digital signal PI to the microprocessor MP.
- a filter FI and / or amplifier V can be provided in any order between the analog integrator INT and the analog-digital converter ADU, for example according to FIG. 3.
- a filter can also be provided in front of the integrator INT.
- the microprocessor MP is designed in such a way that the phase shift generated by the Rogowski coil RS1 and by the Rogowski coil, in particular the integrator INT, where appropriate the filter FI and / or amplifier V, is compensated for, so that phase values for current ip (t ) are determined and used for arcing fault detection.
- the current unit SEI or the arrangement / configuration according to FIG. 3 can be part of the low-voltage circuit breaker according to FIG. 1.
- FIG. 4 shows an equivalent circuit diagram of a Rogowski coil RS1.
- a current ip (t) of the assigned conductor causes an analog voltage ur (t) of the Rogowski coil, which corresponds to the analog voltage Al.
- a mutual inductance M is entered on the equivalent circuit side, this corresponds to the magnetic coupling.
- the stray field inductance L lying in series leads to a phase shift of the output voltage.
- the winding resistance RR in series leads to a change in the amplitude.
- FIG. 5 shows an example of a course.
- FIG. 5 shows a first diagram with a voltage curve ur or ur (t) in mV of the output voltage of the Rogowski coil and a current curve ip or ip (t) in A of the current of the conductor over time t in ms, which is on the horizontal Axis is specified. The phase shift between current and voltage is clearly visible.
- Figure 6 shows an arrangement according to Figure 4, with the difference that an integrator INT is connected to the output of the Rogowski coil RS1, in the example consisting of an RC element, with a resulting capacitance C, e.g. in the form of one or more capacitors, and an integrator resistor (Rinte) is connected in series with at least one conductor or both conductors.
- an integrator INT is connected to the output of the Rogowski coil RS1, in the example consisting of an RC element, with a resulting capacitance C, e.g. in the form of one or more capacitors, and an integrator resistor (Rinte) is connected in series with at least one conductor or both conductors.
- the integrated analog output voltage uc (t) is output at the integrator INT.
- FIG. 7 shows a second diagram with a voltage and current profile according to FIG. 5, with the difference that Instead of the voltage ur (t) or Al of the Rogowski coil RS1, the integrated analog voltage uc or uc (t) is plotted in mV over the time t in ms.
- phase shift is partially compensated by the analog integration, as can be seen in FIG. 7, but not completely.
- FIG 8 shows an equivalent circuit diagram according to Figure 6 with summarized components.
- FIG. 9 shows a third diagram with a first and a second current profile according to FIG. 5, with the difference that instead of the integrated analog voltage uc or uc (t), the calculated current ip or ip (t) - B compared to measured current ip or ip (t) - G is plotted against the time t in ms.
- phase-correct current values that can be used to protect the low-voltage alternating current circuit, in particular for the detection of arcing faults and for the detection of other fault situations.
- phase-accurate or phase-correct current values are therefore phase-accurate or phase-correct current values, these phase-correct voltage and current values being advantageous for arc fault detection or the detection of other fault situations Protection of the low-voltage AC circuit used who can.
- an analog integrator circuit is therefore used, which can consist, for example, of an RC element.
- a replacement circuit diagram corresponding to FIG. 6 is obtained, the winding capacity of the Rogowski coil being neglected.
- the phase shift is only partially compensated for by the integrator. The phase difference is shown in FIG. 7
- the current in the conductor or primary current is now calculated by the back calculation of the transmission behavior of the Ro
- Components are these or can also be calculated back according to the invention. This is done according to the
- Rogowski coils can in future be used in protective devices such as low-voltage circuit breakers or arcing detection units for the detection of demanding fault situations.
- u M (t) u L (t) + u R (t) + u c (t) (1) can determine the voltage by (t) over the mutual inductance M and thus calculate the primary current iP after a numerical integration, for example in the microprocessor MP.
- the voltage u c (t) is the measured value across the capacitance C of the integrator INT.
- the secondary current is used to calculate the individual voltages
- the voltage across the combined resistance of the Rogowski coil and integrator can be calculated using the following formula: du c (t)
- the voltage across an inductor is generally calculated according to di (t)
- the current is used to calculate the voltage u L across the inductance
- u L can be calculated directly from the measured voltage u c : d 2 u c (t)
- the integration of the current change determines the primary current as follows:
- gowski coil can be dispensed with.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22207230.8A EP4152540B1 (en) | 2018-09-27 | 2018-09-27 | Low voltage circuit breaker |
EP22207228.2A EP4152539B1 (en) | 2018-09-27 | 2018-09-27 | Arrangement and method for a low voltage alternating current circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2018/076271 WO2020064110A1 (en) | 2018-09-27 | 2018-09-27 | Low-voltage power switch and arc fault detection unit with compensation due to phase shifting |
Related Child Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22207228.2A Division-Into EP4152539B1 (en) | 2018-09-27 | 2018-09-27 | Arrangement and method for a low voltage alternating current circuit |
EP22207228.2A Division EP4152539B1 (en) | 2018-09-27 | 2018-09-27 | Arrangement and method for a low voltage alternating current circuit |
EP22207230.8A Division EP4152540B1 (en) | 2018-09-27 | 2018-09-27 | Low voltage circuit breaker |
EP22207230.8A Division-Into EP4152540B1 (en) | 2018-09-27 | 2018-09-27 | Low voltage circuit breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3799670A1 true EP3799670A1 (en) | 2021-04-07 |
EP3799670B1 EP3799670B1 (en) | 2023-01-11 |
Family
ID=63840793
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22207228.2A Active EP4152539B1 (en) | 2018-09-27 | 2018-09-27 | Arrangement and method for a low voltage alternating current circuit |
EP18785862.6A Active EP3799670B1 (en) | 2018-09-27 | 2018-09-27 | Low-voltage power switch and arc fault detection unit with compensation due to phase shifting |
EP22207230.8A Active EP4152540B1 (en) | 2018-09-27 | 2018-09-27 | Low voltage circuit breaker |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22207228.2A Active EP4152539B1 (en) | 2018-09-27 | 2018-09-27 | Arrangement and method for a low voltage alternating current circuit |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22207230.8A Active EP4152540B1 (en) | 2018-09-27 | 2018-09-27 | Low voltage circuit breaker |
Country Status (4)
Country | Link |
---|---|
US (2) | US11372027B2 (en) |
EP (3) | EP4152539B1 (en) |
CN (2) | CN117424170A (en) |
WO (1) | WO2020064110A1 (en) |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
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US5185684A (en) * | 1991-03-28 | 1993-02-09 | Eaton Corporation | Frequency selective arc detection |
US5461306A (en) * | 1993-12-28 | 1995-10-24 | Schlumberger Industries, Inc. | DC current detection system for a current transformer |
JP3410043B2 (en) * | 1999-04-28 | 2003-05-26 | 三菱電機株式会社 | Current detection system |
US6670799B1 (en) * | 2000-05-03 | 2003-12-30 | Nxt Phase Corporation | Optical current measuring for high voltage systems |
DE102004011023A1 (en) * | 2004-03-04 | 2005-09-15 | Siemens Ag | Three or four-pole low-voltage circuit breaker, has output signals from Rogowski coils fed via low-pass filters to measuring amplifier and via resistances to integrating capacitor |
EP1896859A1 (en) * | 2005-06-29 | 2008-03-12 | Abb Research Ltd. | Apparatus for the detection of a current and method for operating such an apparatus |
KR100760331B1 (en) * | 2006-03-30 | 2007-09-20 | 신성산전주식회사 | High speed automatic circuit breaker for protection |
US7638999B2 (en) * | 2006-04-07 | 2009-12-29 | Cooper Technologies Company | Protective relay device, system and methods for Rogowski coil sensors |
US20090243590A1 (en) * | 2008-04-01 | 2009-10-01 | Stephen James West | System and method for monitoring current in a conductor |
US8908338B2 (en) * | 2009-06-03 | 2014-12-09 | Siemens Industry, Inc. | Methods and apparatus for multi-frequency ground fault circuit interrupt grounded neutral fault detection |
US8203814B2 (en) * | 2009-08-31 | 2012-06-19 | Eaton Corporation | Electrical switching apparatus including a plurality of Rogowski coils and method of calibrating the same |
US8542021B2 (en) * | 2010-11-16 | 2013-09-24 | Schneider Electric USA, Inc. | Multi-pole arcing fault circuit breaker including a neutral current sensor |
DE202012012649U1 (en) * | 2012-08-01 | 2013-08-28 | Roland Hinke | Device for measuring an alternating current |
DE102012107021B4 (en) * | 2012-08-01 | 2014-10-30 | Roland Hinke | Apparatus and method for measuring an alternating current |
US9276393B2 (en) * | 2012-10-01 | 2016-03-01 | Leviton Manufacturing Co., Inc. | Processor-based circuit interrupting devices |
FR3019303B1 (en) * | 2014-04-01 | 2019-06-14 | Socomec | DEVICE FOR MEASURING AT LEAST ONE PHYSICAL SIZE OF AN ELECTRICAL INSTALLATION |
US9606146B2 (en) | 2014-09-25 | 2017-03-28 | Fluke Corporation | Wireless rogowski coil system |
DE102015216981B4 (en) * | 2014-12-18 | 2022-07-28 | Siemens Aktiengesellschaft | circuit breaker |
US10135235B2 (en) * | 2015-11-24 | 2018-11-20 | Abb Schweiz Ag | Digital ground-fault circuit interrupter |
FR3059783B1 (en) * | 2016-12-07 | 2019-01-25 | Hager-Electro Sas | METHOD FOR MANUFACTURING A MEASUREMENT SENSOR FOR A CIRCUIT BREAKER |
-
2018
- 2018-09-27 CN CN202311174942.7A patent/CN117424170A/en active Pending
- 2018-09-27 CN CN201880097954.5A patent/CN112753147B/en active Active
- 2018-09-27 WO PCT/EP2018/076271 patent/WO2020064110A1/en unknown
- 2018-09-27 EP EP22207228.2A patent/EP4152539B1/en active Active
- 2018-09-27 EP EP18785862.6A patent/EP3799670B1/en active Active
- 2018-09-27 US US17/276,854 patent/US11372027B2/en active Active
- 2018-09-27 EP EP22207230.8A patent/EP4152540B1/en active Active
-
2022
- 2022-05-27 US US17/826,750 patent/US11698392B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN112753147A (en) | 2021-05-04 |
US20220291259A1 (en) | 2022-09-15 |
US11698392B2 (en) | 2023-07-11 |
US20220034942A1 (en) | 2022-02-03 |
WO2020064110A1 (en) | 2020-04-02 |
EP4152540A1 (en) | 2023-03-22 |
EP3799670B1 (en) | 2023-01-11 |
EP4152540B1 (en) | 2024-03-06 |
EP4152539A1 (en) | 2023-03-22 |
EP4152539B1 (en) | 2024-05-15 |
US11372027B2 (en) | 2022-06-28 |
CN117424170A (en) | 2024-01-19 |
CN112753147B (en) | 2023-10-10 |
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